Device for boring the lockholes in doors



Oct. 27, 1953 c, GELLERT AL 2,656,862

DEVICE FOR BORING 'I HE LOCKHOLES IN DOORS Filed Dec. 9, 1949 3 Sheets-She%l ATTORNEY Oct. 27, 1953 c, GELLERT ET AL 2,656,862

DEVICE FOR BORING THE LOCKHOLES IN DOORS Filed Dec. 9, 1949 5 Sheets-Sheet 2 INVENTOR. CARL 'GELLERT BY F/PEO GELLERT ATTORNEY Patented Oct. 27, 1953 DEVICE FOR," BORING IN D00 Carl Gellert and Fred .Gellert,

SafiFrancisco, Calif;

ApplicatiomDecemben 9, 1949; Serial No.=' 1-3'1','978

2 Claims. 1 V

This invention= relates to door finishing machines and more particularly to apparatus for finishing a stock door for installation in a door frame.

As-well known; the general type of stock doors, and particularly thoseemployed in residence i construction, are received froml the mill generally dimensioned in two inch multiples, both in length and width.- Thickness usually varies from 1 inches t'O-1 inches for interior doors; In a large construction projeetalg-reat many doors are required and litis therefore iinportantrthat finishing of-stocle doors be'standardized andlaccomplished' mechanically.

Asthe doors-come from: the millto a builder, the opposite planar :facesare finished and sanded and .-need no furthen woodworking-i operations: However, (the outer oppositeedges of the stiles are. not usually precisely square withthe topand the, bottomedges of the door, andiniact the-door is usually madea trifle..more thanntheidesi'red" fin ished width, and of substantial excesslength so thattproper trimming, may he .made to 'predet'en; mined dimensions-oflength and" widthr Tlie 'doo'n also lacks a bevelat its free or l'eadhsideiedge to accommodate. the. arcuate. swingv of. that edgeint-o the. jam!) and. againstthe' usual stop strip. Ob; viously the door lacks finishing for lock and hinge hardware. since-thesetfaoilities. are according to the preference of the individual. builder,

The. present. invention comprises an apparatus" iorifini'shihg a door ready for installation in a door. f'ramehy transit of the door through the" apparatus whileits leaded'geis' aligned against a; longitudinalguide means. In the present" examplification there are two platforms orlvtahles in general longitudinal alignment. At a first platform ori-edging" talole the longitudinal side edges of thedoor are shaped;- whileat a second platform or sawing table the 'd'ooris t'riinmed for length and finished'for installation" of facilities such as lock andibolti' a'n'd'hingei Since finished doors are desiredof varying-widths, transversely adjustable means are providedforfltrimming of the, longitudinal side edges, and adjustable stop means are provided" for Varyingthelength of doors: in transit the opposite side edges of -the door are engaged by blades of cutters or shaperheads andthus trimmed to precisely the same width throughout the length of' thestiles of the door; tliecutter at the-leaidedgeotthe door hai ing' a vertically inclind blade'so that it effects a b'evei cutat the lead edge.

Intermediate the ends of.t'he::tab1es there. are two sets ofzro'llers"; eachtset comprising a pair of rollermembers transversely of therfirst; ornedgin'gr table; and having: the rollers: or each pair rela: tively' spaced one: above the other to receive i the door therebetwe'en during-the advancement or-the door between edge =sha'per heads; on'e=o f the 'rollers in each: pair being a driven-roller and the: other being an idler tensioned tomaintain the door" pressed downward-against the driven-roller; these rollers being: adapted to-wurgethe door towards the aligning guide? rail;

The sets of-transverse' rollers advancetherdoon to a second or end-sawing tableirthe' top o l-which is: 'slidable transversely: Atxeach of the opposite ends of thesliding table topis awrotary -saw which! trims-the ends of thedoorsquarely to the previ ously trimmed side edgeswhen the table top-ismoved transversely against-the: saws. 1 After=-the ends of thedoor ar trimmed; theislidable topeof this second tableis returned to its--0rigina1-align-- ment with i the: first table.

The guide ra-iledge portion or. the secondtable has an inset cutout portion removed" to i receive within theinsetiameanslfor locking the-door at a fixed position Atthisrlocking devicethere is a rotary bit'which may be elevated todrilla look-.- hole through thedoor. This locking means also includes a bracket-"having: doweliguidesi-or sockets: to receivedowel pin guides of abolthole-template: having; a bit for drilling aboltr hole into the. lead edge of the door in proper relation to the-100khole. After drilling the bolt hole thesame-dowel.

' guide sockets may' be employedto receive dowel pin guidesoi a. second template ior. routing the lead edge of:th .-door--adjacent=the bolt hole-for receiving a faceplate for the-bolt.- i

. Aft-er squaring theutop-and bottom: edges of the: door ancludrilling for the. lock and bolt :which are-effected while the door isco-planar with the tabletopythe 'door may lie-shifted to" a vertical plane longitudinally along the side: of the table with its lead edgepressed'against supportingbrackets and: its rear-or hinge edge: upwardly," whereupon recesses may be 'routediou-t by suitable templates for hingesbuttsa If desired hingevbutts" may be conveniently attaohed to the rear'edge of" the'door whll'e'it is somounted lengthwise against the vertical" side of the table;

One form innwhich theinventioir may be em bodied is moretion with the accompanying: drawings in which t Fig; 1 is a side elevation of the invention, broken at portions i of. its length.

Fig. 2' is a planvie'w of the invention, brokenat portions of its length; i

Fig. 3 is. anrenlargedverticaltransverse sec=- tion on line 3'-3 of Fig. I.

particularly describedin conned Fig. 4 is a fragmentary longitudinal vertical section on line 44 of Fig. 2.

Fig. 5 is an enlarged vertical transverse section on line 5--5 of Fig. 2.

Fig. 6 is an enlarged transverse vertical section on line 6-3 of Fig. 1.

Fig. 7 is a fragmentary enlarged transverse vertical section on line 1-! of Fig. 1.

Fig. 8 is an enlarged transverse vertical section on line 8-8 of Fig. 5.

Fig. 9 is a wiring diagram of circuits.

Figs. 10, 11 and 12 are perspective views of templates.

Referring to the drawings in which like reference characters indicate corresponding parts in the several views, I!) indicates a suitable supporting elongated. base above which is spaced a first or edging table, generally indicated I I and a second or end-sawing table generally indicated I2, the tables being generally in relative longitudinal alignment as a unit for finishing operations on a door. The tables are supported by any suitable upright supports I3 and I4.

One longitudinal side of the edging table frame has a fixed longitudinal horizontally planar platform strip portion I5 having an upstanding guide rail member It the entire length of one outer edge, the inner face of the 'guide rail being perpendicular to the plane of the platform I5 up to a shaper head to be described, the guide rail being chamfered as at Ifia beyond the shaper head. A cross thwart II may brace the edging table frame transversely at its end adjacent the end sawing table, and in effect is a co-planar part thereof.

Parallelly spaced from the fixed longitudinal platform I5, the edging table is provided with a substantially parallel transversely adjustable elongated strip platform I8, the upper face of which is co-planar with the upper face of fixed platform I5, the adjustable platform terminating at one end short of the cross thwart I! as at I9, and being substantially co-terminal in length with fixed platform I5 at the opposite or free end I. The apparatus is free of cross members between the two platform strips adjacent to the last mentioned initial terminal end, providing free space between the platform strips for an operator conveniently to manipulate a door upon the platforms.

The integral continuity of the platform strips I5 and I8 is interrupted by transverse spacer gaps therein as at 25. At the gaps there are provided a plurality of sets of transverse rollers, the sets of rollers being relatively spaced longitudinally of the platforms for propelling a door. Two sets of these rollers are conveniently effective for doors of accepted average length. Each set of rollers comprises a pair of horizontal roller members parallelly spaced relatively in a vertical plane, one of the rollers in each pair being an idler pressure roller 2| and the other being a driven roller 22, the driven rollers being rotated by a belt train 23 from a conventional variable speed motor 2 operated by a switch 25 positioned on the under face adjacent the free or initial end I of the adjustable platform strip I8 where it is conveniently manually operable by the operator as he places a door on the edging table.

Each driven roller 22 has its circumferential roller face extended a trifle above the upper face of the platform strip sufficiently to frictionally engage the face of a door resting on the platform strips. The upper or pressure rollers 2| each has its circumferental roller face normally spaced from the drive roller substantially the thickness of a door, this spacing being adjustable and tensioned by mounting the shaft of the roller at its ends in bearings which are mounted in plate 25 vertically adjustable in tracks 26a and tensioned downwardly by springs 21. The shafts of the rollers are supported at the opposite ends thereof by bearings in supporting frames 28. When a door is being propelled by the rollers it is constantly urged toward the face of the guide rail It for which purpose the axis of each of the rollers is not exactly perpendicular to the inner face of guide rail I6, but is imperceptibly angular thereto in a horizontal plane, between one-half and one degree being sufficient, as indicated in Fig. 2 by an arbitrary spacing 3i relative to cross brace I1. The faces of all the rollers are covered with friction grip material such as rubber composition and may have a helical rib 32 pitched to also continually urge a door on the table towards the guide rails. Further means for initially urging the door toward the guide rail I6 and aligning the door for feed to the rollers comprises an edge-engaging roller 33. mounted on a pivoted spring tensioned lever 34, mounted on the upper face of adjustable platform I8.

The movement of the transversely adjustable platform strip I8 is accomplished by a suitable transversely slidable carriage 35 upon which the platform is mounted. The carriage as exemplified herein comprises a pair of spaced vertical plates 36, 31 appropriately connected by cross strips 38. The plates of the carriage, intermediate their height, are slidably mounted to ride on a pair of spaced transverse shafts 39 which have opposite ends mounted in fixed supporting plates 4 I, 42 adjacent opposite sides of the supporting frame of the apparatus. The bottom edge of the carriage plates 36, 31 are stabilized by slidingly engaging transverse relatively spaced angled tracks 43. Both of the carriage plates are provided with openings therethrough as at 44 and in one or both of the openings is mounted an internally threaded flanged collar 45. shaft 46 extends through and is engaged in the threaded collar, the opposite outer end of the shaft being rotatably journaled as at 41 in a frame support, said shaft being provided at its outer terminal end with the wheel crank and handle 48, whereby shaft 46 may be rotated for moving the carriage 35 and platform strip I8 transversely of the edging table and thereby adjusting the relative spacing between the door supporting platforms I5, I8, for doors of varying widths. As a convenience, a suitably calibrated scale 50 may be mounted transversely of the supporting frame adjacent the shaft 36, and the carriage 35 may carry a pointer indicator 5I by which a predetermined finished width may be set for a door, the pointer being positioned in the vertical plane of the cutting blade of an edge trimmer which will be further described.

Each of the platform strips I5, I8 is provided with a cutter means to trim the side edges of a door which is being propelled lengthwise of the edging table between the rollers 2|, 22. Such means consist of a shaper head assembly mounted in each of the platforms I5, I8, the assembly 52 in platform I'5 being fixedly mounted to the supporting frame, and assembly 53 in adjustable platform I8 being mounted on carriage 35 to move transversely with the carriage and adjustable platform I8. The shaper head assemblies each comprise a vertically disposed bearing 54 and a vertically disposed drive shaft 55 therein driven A complementally threaded t I03 may be closed to both motors 99 to drive both the raised saws simultaneously.

While the saws are raised and rotated, the table top having a door resting upon it may be moved'transversely towards the saws, and the portions of the opposite ends of the door extending beyond the end of the saw table top are thereby severed by the saws to finish the door to a predetermined length, the flanged fingers 83 of the table top maintaining the bevelled lead edge of the door while the table top is being slid transversely and the sawing operation effected.

In sliding the table top and door thereon for. the sawing operations, it may be desirable to provide means to start the sliding movement of the table top from the exterior side of the guide rail, in order to protect the fingers of the operator. Such means is here provided by a plate I04 facing the exterior side wall of the guide rail I and having pins I05 slidably extending through the guide rail to bear upon the abutting edge of the table top, the pins being of a length that the plate is pushed outward from the guide rail when the table top is in contact with the inner face of the guide rail, and therefore it is only necessary to push the plate in against the wall of the guide rail in order to start the transverse movement of the table top.

Suitable stop means are provided atthe terminal end of the sawing table against which a door may strike when initially delivered to the sawing table. In this connection it is to be noted that stock doors when received usually have the side' stiles extending beyond the top and bottom of the transverse rails. ure door lengths from the top rail to the bottom rail rather than from the top of the stiles which are of irregular length, sometimes varying quite substantially. Therefore the stop means is adapted to be engaged by the top edge ofthe top cross rail of the door. Yet the stile, usually extending beyond the top rail, would engage the stop member when the door and table top were moved transversely for sawing, for which reason a stop means is provided which swings away from contact with the door rail when the saws are raised to sawing position, at which time the transverse movement of the door and the table top is accomplished.

An exemplified form of stop means comprises i a vertically angled bar I06 mounted at its lower end to the tiltablebeam SI of the saw-frame. The upper end of bar I06 is normally maintained in door-stopping relation closely spaced from the adjacent end of table 80, but when the pedal IOI is pressed to raise the saws, the upper end of the stop bar is swung in an arc forwardly and downwardly away from the table end to the position shown in broken line in Fig. 6, whereupon the extended end of the adjacent stile of the door on the table may pass the stop member without interference. Upon release of the pedal the saw frame and saws return to normal downward position and the stop member returns to normal stopping position at the end of the table.

There are certain types of doors, particularly in residential buildings, which are desired of shorter length than the usual room-to-room or closet door, such as doors which must be swung over extra thick or padded rugs and carpets, and bathroom or kitchen doors which may be swung over tiled floors where the plane of the fioor is higher than the usual room floors or door treads. In that event it is desirable to make a saw cut of a strip of greater width from the bottom of Yet it is desirable to measthe door. This may be accomplished by first sawing the ends of the door in the usual manner to obtain a finished and squared top edge and then moving the door longitudinally on the table in the direction of the saw in the slot 8|, to the extent of the desired additional cut from the bottom rail of the door. This additional cut is usually of a uniform width which may be measured from the top of the door by a pivoted stop finger III mounted at the upper end of the stop bar I06 which may be swung on its pivot to overlie the table top as shown in dotted line in Fig. 2. Since this auxiliary stop finger which overlies the table top is pivotally mounted it does not interfere in any way with the sliding of the table top to effect the additional saw cut at the bottom, because raising the saws for making such additional saw cut moves the stop bar I06 arcuately forwardly and downwardly away from the terminal end of the table, and if the extended auxiliary stop finger should strike the table it would merely be kicked out of the way. However, in normal operation there would be no such interference by the auxiliary stop finger III, because an operator would flip it on its pivot out of any such interference after it has been employed to position the door at a predetermined position for the extra saw cut of the bottom edge of the door.

The saw cuts of the ends of the door square the door at right angles at top and bottom relative to the trimmed side edges, since the side edges have been trimmed relatively parallel by the shaper heads, and the trimmed edges are continually maintained squarely perpendicular to the end cut of the saws by the guide rail I6 and by the flanged fingers 83 which latter have the same alignment as the guide rail and move with the table for maintaining the door alignment during the end-sawing operation.

Means are provided at the sawing table I2 for appropriately cutting holes for a lock, a bolt, and a recess for a bolt plate and for routing recesses for mounting hinge butts. As previously described the bevelled face portion IBa of the guide rail extends along the front edge of the supporting frame and therefore confronts the adjacent front edge of the table top 80 which has the inset 82 therein. Within the planar dimensions of the inset 82 there is mounted on the supporting frame of the table I2 a doorclamp generally indicated I20, and a rotary circular bit assembly generally indicated I2I. The clamp I20 is for gripping and holding the door while the bit apparatus is operative to drill a hole for a lock.

The clamp comprises a vertically movable clamping plate I22 and a fixed clamping plate I23 which are relatively spaced horizontally parallel. Each of these plates has a central opening therethrough I22a and I23a. As shown herein, the fixed plate I23 is uppermost, whereas the movable clamping plate I22 is normally coplanar with the upper face of the table top 80, or slightly therebelow suflicient to permit clear ance for a door sliding on said table top. These clamping plates and the boring bit apparatus may optionally assume any one of three relationships, only one of which is illustrated herein, since the otherforms would merely be a transposition of operative parts. In one form a movable plate I22 may be uppermost and move downwardly toward a fixed plate I23 at the table level, the bit apparatus being therebelow; in another form the fixed plate I23 may be at table level, the moving plate I22 thereabove and the boring amass 9 bit apparatus mounted above the upper plate toiioperate downwardly; the third form being illustrated herein in which: the plane of the movable plate normally coincides: substantially with the plane of thetable top Ill. and the. bit apparatus is 'therebelow, this-term. beingadopted in the present exemplification merely because: it waszconlvenientz in connection. vwith other structural factors;

fixedzclamping platellzn suitably: supported .theframe. in a plane parallellyhorizontal. to the; movable plate 4.2 25 andspaced above the: normal. plane: at the movable. plate and the tabletop fora greater distance. than the. thicknessof a door to be: operated thereupon there'- fore, it is obvious that thefixed plate: is. above the necessary height of the bevel] 6a ofthe snide rail. lit The supportion the1..fixede.plate-..|23 comprisesbraceslfllinchned upwardly and. outwardly, the inclinethereot. permitting a shorter interruption. or; break the continuity of the guide: rail- .than if. the; braces. were perpendicular tothetablaand. spaced. the full length of. the

The; lead; edge of. the ,door. is accessible through the opening between. the inbraces; sov thatother operations may. be periormed on ,thelead edge; ln thecentralopen ng ll-3a of the fixed plate there is a perpendicular, tubular collar member In secured thereto, by pip e flange 126,. the lower end. the collar having a. sharpened edge. I21 slightly prot-ruding beyond the bottom. of. the plate. I 23. sufliciently however merely to indent orbi te into the race ofjhedoor ircumferentially or a loekhole to; bdborcd, therein and thus preventsplintering around the. board hole when a bit breaks through by a. cut from the. opposite side of. the doom The movable clampplate, 1.22.15; supported upon a. bracket. having sleeves 128- which are, reciprocable upon vertical rods I3llsufltably fixed upon the frame as at I3l, theplate with the door restlng thereon beingeleyated by a train of links I32, responsive to a handle lever 133 which at eleva edpqs on. be en a d in, look, I and thus hold the door slightly; elevated iron; the tabletop 8B and against the fixed. plate: I23, with the sharpened. edge I21; of collar I25. biting a circle intotheopposite face of the; door-stile, the plate being lowered byvveight oi the door. when thahandle is releasedjrom the lock, though the handle may be. employed. to positively lower the plate if. desired.

. flfhe circular bit assembly generally indicated l2! comprises a motor unit- 1:35 having. chuck I36 mountedfor rotation bythe motor shaft the chuck engaging for rotation the-shank oLa circular wood bit 137. The motor shaft chuekwand rotary bit are coaxially aligned with the collar I25. and preferably also with the opening luo of plate I22 though this latter is not; essential so long as the opening 422 a is sufficiently large to receive the bit therethrough with suitable clearancea The :bit unit: l2] .mounted,or,vertical reciprocation. by brackets J36 which are, slidable upon shafts I30, the reciprocation being responsive to link train I40. responsive to manipulation of. lever handle. I, a .suitablelswitchillz; being conveniently e rned by the motor. B5. A bumper member L39 may support. the bit-assembly at rest or cushion theimpaet of lowering it. It is believed obvious that plate openings Li -2d,. 123a and collar-.lixiand its sharpened edge L21 are of a greater diameter, thancircular bit .13?! and sized to suficiently clearrtheiteeth o1 the I0 circular bit which must pass therethrough the thrust. pressure of the. clamp platesand the b.or l ng bit beingremoved from the table to and. its

slide mechanism during; the gripping of the door and the boring ofthe lock hole and the indenting or bitingminto the surface of. the door by the annular sharpenedi'edge. |-2|.

i Means are. carried: by the fixedplate .123. for positioning of; templates for drilling av bolt hole into the edge: of the door and into communicatior'r with the. lock hole, and for holding another template for recessing the; edge of the door fora rboltiplate. Such means may consist of a pair of relatively spaced sockets M3 fixed to the upper face: of the fixed plate .123 for snugly slidably receiving pins H which are mounted on a templateldfi having aproperly spaced tubular guide M6 for a wood bit 141 for drilling the bolt hole the door edge. Upon removal or the bolt hole template 1%, a second template. [48, having a suitably shaped'opening I150, maybe mounted against the edge of the door exposed between theinclined braces 24 and suitablypositioned by similar pins. I51, whereupon a suitable router machine may be employed through the opening; oi the. template to rout a recess for a bolt plate. the. door edge.

The door having been finished at its. side edges and; ends, and having the lock hole, bolt hole and bolt plate: recess made therein, may be convenientlylliftedj manually from its: bed on table. top 3d and slid to. overlie the. front wall of the sup.- porting framewith its. lead edge: resting in fixed brackets 152:; or it it. beta. transversely narrow door, by restmgsaid lead edge in brackets I53 which are. slid'able inwardly and outwardly on the frame, the' vertical positioning of said brackets being arranged so.- that. the rear or butt edge 04% the door 'isth'us spaced above the top edge of guide rail 16. It is practically immaterial whether the. tear or butt edge of the door is thus spacedlabove the upper face of the fixed clamping plate M3, because the operation performed art-this; positionis the routing for hinge butts which. are almost. invariably adjacent the opposite: ends of the door and seldom at a vertical central portion of the door,. except in unusually and heavy entrance doors. The door having been mounted. in. the brackets, either I52 or E5 an elongatedtemplate lid or suitable length having side.- mpping flanges 1-55 is placed lengthwise otthebutt edge of the door, the template having... predetermined therein through. which the same or a similar routertool as previously, referred to may be employedto routrecesses for hingebutts. If desired, the hinge butts may be. mounted on. the door at thisposition, thus leavingonly one complemental butt. tobeattachedlto.adoorjamb when the door is hlme.

In. this. connection it, may be stated. that it is not usual practieezto mount locks and bolt hardwere: in adooruntil. the door is mounted in its frame, since such hardware usually has. a. refined metal finish and is usually not installed until after liability togdamageor, breakage is past.

, In. operation thedoora. is manually placed upon the platforms l5 and la or edging table. It its: lead edge is against the face of guide rail H, which will automatically align the lead edge. for cutting'engagementl by the bevelled shaper head 52. The-crank wheel 48 isv rotated to adjust th platform i=8 transversely until the pointer 5| registers onscale "the predetermined or de'sired widthoffinlshed door; Atan'initial step of man- .spaced openingsv 156 ually feeding the door towards the first set of conveying rollers 2I, 22 the lead edge b is continually urged toward the face of the guide rail by the spring tensioned roller 33 bearing against butt edge 0. After the door has been engaged by the first set of rollers 2|, 22 the lead edge 22 is continually urged towards the guide rail by the successive sets of rollers, as described. As the side edges b and pass the rotating shaper heads these edges are trimmed to the predetermined scale width, the blades 63 trimming the butt or hinge edge 0 perpendicular to the plane of the door, and the blades 64 trimming the lead edge I) to a corresponding chamfer d, after which the chamfered edge d bears against the complementally bevel face ltd of the guide rail. The refuse cuttings are thrown through the bottom openings of the chip remover I5.

As the edges 5 and c are progressively trimmed, the second set of rollers 2I, 22 propel and transfer the door to the top 80 of sawing table I2, the door having transverse support during the advancement and transfer by the plane of the cross brace I'I. It is preferred that the second set of rollers release the door prior to the engagement of the top of the door against the stop I06 or Iii, as the case may be, since experience has demonstrated that in view of the somewhat irregular length of door stiles and the desire for accurate sawing at the ends, it is more practical to make manual adjustment of the door for the final few inches to abut the stop member and insure snug contact of its bevelled edge against the bevelled face IBa of the guide rail. It is to be understood that when advancing the door to table I2 the movable plate I22 is substantially co-planar with table top 80 so that the door may readily slide thereover, the door being positioned with edge e of its top rail against the stop member.

At this stage of operation, precedence may be given either to the sawing of the ends of the door or the operations performed at the clamping assembly I20, such as boring the lock and bolt holes, the operations being successive regardless of which is effected first. As a matter of choice, it is preferred to perform the operations of the bit assembly I2I first and thereafter saw the ends of the door, since after sawing the ends of the door it is convenient to tip the door on its side edge for routing the rear edge for hinge butts.

The door having been positioned on the table top 80 against stop I06 and with its chamfered lead edge at against the bevel IGa of the guide rail, the movable lock plate I22 is, in the present example, manually raised upwardly by operation of handle lever I33 whereby the door overlying the plate is bodily raised in its entirety from the table top and clamped against the fixed plate I23 and maintained so raised and clamped by engaging the handle lever I33 in the lock I34. It will be observed that the lead edge of the door is exposed through the opening between the inclined brackets I24. With the door at this position, the bit switch I42 is closed to operate motor I35 and thereby rotate the circular bit 31, whereupon the handle lever I4I is manipulated to raise the bit through the plate opening H211 and cut the lock hole 1 in the door, the sharpened circular edge I21 of the collar biting into the opposite face of the door around the cut hole and preventing splintering around the edges of the cut as the bit breaks through. The opening of collar I25 permits the bit teeth to break through without striking foreign objects and also serves to further prevent injury to an operator from the high speed of the'bit. The lock hole 1 having been cut the handle lever MI is released and the bit assembly will return to its downward position by gravity, or if desired, it may be lowered by means of the handle and gently contact bumper While the door remains locked in the clamp the pins I44 of the bolt hole template I45 are mounted in the sockets I43 which accurately positions the bit I41 to cut the bolt hole g into the side edge and into communication with the lock hole. Having cut the bolt hole, the second template M8 is similarly mounted by pins in the sockets I43 and a router blade inserted through its opening I50 to rout a recess in the door edge for a bolt face plate.

After the aforesaid operation at. the clamp plates, the clamp is released and the door returned to lay freely upon the table top with the edge e of its top stile against the stop member I06, and its bevelled edge d squared against the guide rail Ida, whereupon the foot pedal IOI is depressed which rocks the saw frame 90 on its pivots 92 and thereby simultaneously raises the saws 88 at opposite ends of the table top, so that the cutting edges of the saws are above the table top and moves the stop member I06 out of the way of the extended end h of the stile. 'With the saws raised the switch I03 is closed to operate both motors 9?} simultaneously, whereby the saws are rotated in unison. Obviously, if desired, the switch I03 may be automatically closed by the raising of the saws, by mere mechanical expedient of placing the switch close to the saw frame and a trip on the frame or pedal to close the switch to rotate the saws. While the saws are raised and rotating the table top 80 and door thereon are slid upon the rollers 84 towards the saws which trim the top e and bottom 1' to the predetermined length, thehooks 81 being operative to engage the roller shafts to limit the sliding transverse movement of the table top. As previously stated, a second out may, if desired, be made at either end of the door by retracting the table top, shifting the door thereon a desired distance longitudinally and making the desired end cuts. It will be noted that the flanged fingers 83 at the edge of the table top travel with the table top and maintain the same squared alignment of the door as previously accomplished by the bevelled face IBa of the guide rail. After the sawing operation, the foot pedal is released and the saws are returned to their lowered position by gravity and tension of spring I00.

When the ends of the door have been sawed and the table top retracted, the door may be manually lifted from the table and its lead edge (1 slid into the bracket IE2 or I53 (depending on the transverse width of the door), with the plane of the door parallel to the front side 3 of table I2. Such position disposes the rear or butt edge 0 of the door upwardly. The elongated template I54 is placed upon the rear or butt edge 0 of the door and the router machine employed through appropriately spaced openings I56 to rout recesses for hinge butts, and if desired one butt of each hinge may be secured to the door while so positioned.

The bit I4'I employed with the bolt hole tem-' plate I45 as well as the routers may be driven electrically.

Having described the claimed as patentable is:

1. In a door finishing apparatus having a invention, what is table top for receiving a door flatly thereon, means adjacent one edge of the table top for boring a lock hole through a door on the table top, including a clamp plate inset into an adjacent edge of the table top substantially coplanar with the table top, another clamping plate spaced overlying and parallel to the first mentioned plate, said clamp plates each having an opening therein, a boring bit reciprocable through the openings in the clamp plates and through the plane of the table top, the opening of the clamp plate most remote from the bit having an annular sharpened edge extending from the face of said remote clamp plate for biting into the door face which is opposite the boring bit, the opening of said remote clamp plate and the annular sharpened edge thereof being of sufliciently greater diameter than the bit to provide sliding clearance therebetween.

2. In a door finishing apparatus having a table top for receiving a door flatly thereon, means adjacent to one edge of the table top for boring a lock hole through a door on the table top, including a clamp member opposed to one face of the table top for holding a door in flat relation to the table top, said clamp member having an opening therethrough and an annular sharpened edge around said opening extending from the clamp member toward the table top, and a boring bit at the opposite face of the table top and axially aligned with the annular sharpened edge, said bit being reciprocable through the plane 01 the table top and door thereon and through said annular sharpened edge and clamp opening, said annular sharpened edge being adapted for biting into the face of the door opposite the bit when the door is engaged by the clamp, and being of a diameter sufficiently greater than the diameter of the bit to permit the bit sliding clearance therethrough.

CARL GELLERT.

FRED GELLERT.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 858,903 Oldham JUlly 2, 1907 1,031,945 Long July 9, 1912 1,242,369 Parker Oct. 9, 1917 1,394,766 Smith Oct. 25, 1921 1,464,020 Anderson et al. Aug. 7, 1923 1,575,308 Alger et a1 Mar. 2, 1926 1,919,900 Moller July 25, 1933 2,207,782 Carlson July 16, 1940 2,273,653 Melby Feb. 17, 1942 2,425,944 Kvalheim Aug. 19, 1947 2,500,724 Weber et al Mar. 14, 1950 

